125 lines
3.7 KiB
OCaml
125 lines
3.7 KiB
OCaml
(**************************************************************************)
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(* *)
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(* Copyright (c) 2014 - 2018. *)
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(* Dynamic Ledger Solutions, Inc. <contact@tezos.com> *)
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(* *)
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(* All rights reserved. No warranty, explicit or implicit, provided. *)
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(* *)
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(**************************************************************************)
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module Encoding =
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struct
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include Encoding
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let splitted ~json ~binary = raw_splitted ~json:(Json.convert json) ~binary
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let assoc enc =
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let json = Json_encoding.assoc (Json.convert enc) in
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let binary = list (tup2 string enc) in
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raw_splitted ~json ~binary
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module Bounded = struct
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let string length =
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raw_splitted
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~binary: begin
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let kind = Binary_size.unsigned_range_to_size length in
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check_size (length + Binary_size.integer_to_size kind) @@
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dynamic_size ~kind Variable.string
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end
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~json: begin
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let open Json_encoding in
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conv
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(fun s ->
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if String.length s > length then invalid_arg "oversized string" ;
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s)
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(fun s ->
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if String.length s > length then
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raise (Cannot_destruct ([], Invalid_argument "oversized string")) ;
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s)
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string
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end
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let bytes length =
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raw_splitted
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~binary: begin
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let kind = Binary_size.unsigned_range_to_size length in
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check_size (length + Binary_size.integer_to_size kind) @@
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dynamic_size ~kind Variable.bytes
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end
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~json: begin
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let open Json_encoding in
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conv
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(fun s ->
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if MBytes.length s > length then invalid_arg "oversized string" ;
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s)
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(fun s ->
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if MBytes.length s > length then
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raise (Cannot_destruct ([], Invalid_argument "oversized string")) ;
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s)
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Json.bytes_jsont
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end
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end
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type 'a lazy_state =
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| Value of 'a
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| Bytes of MBytes.t
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| Both of MBytes.t * 'a
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type 'a lazy_t =
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{ mutable state : 'a lazy_state ;
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encoding : 'a t }
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let force_decode le =
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match le.state with
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| Value value -> Some value
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| Both (_, value) -> Some value
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| Bytes bytes ->
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match Binary_reader.of_bytes le.encoding bytes with
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| Some expr -> le.state <- Both (bytes, expr) ; Some expr
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| None -> None
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let force_bytes le =
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match le.state with
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| Bytes bytes -> bytes
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| Both (bytes, _) -> bytes
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| Value value ->
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let bytes = Binary_writer.to_bytes_exn le.encoding value in
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le.state <- Both (bytes, value) ;
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bytes
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let lazy_encoding encoding =
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let binary =
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Encoding.conv
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force_bytes
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(fun bytes -> { state = Bytes bytes ; encoding })
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Encoding.bytes in
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let json =
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Encoding.conv
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(fun le ->
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match force_decode le with
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| Some r -> r
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| None -> raise Exit)
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(fun value -> { state = Value value ; encoding })
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encoding in
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splitted ~json ~binary
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let make_lazy encoding value =
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{ encoding ; state = Value value }
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end
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include Encoding
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module Json = Json
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module Bson = Bson
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module Binary = struct
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include Binary_error
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include Binary_length
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include Binary_writer
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include Binary_reader
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include Binary_stream_reader
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end
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type json = Json.t
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let json = Json.encoding
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type json_schema = Json.schema
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let json_schema = Json.schema_encoding
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type bson = Bson.t
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